Suction device of paper-making machines



June 16, 1931. 'r. YONEKURA SUCTION DEVICE OF PAPER MAKING MACHINES Filed July 26, 1e2s e Sheets-Sheet 1 June 16, 1931. T.-YONE KURA 1,810,456

SUCTION DEVICE OF PAPER MAKING MACHINES Filed July 26. 1928 6 Sheets-Sheet 2 lllll I June 16, 1931. 'r. YONEKURA SUCTION DEVICE OF PAPER MAKING MACHINES Filed July 26. 1928 6 Sheets-Sheet 3 A TTo/e/wsys June 16, 1931. YQNEKURA SUCTION DEVICE OF PAPER MAKING MACHINES Filed July 26, 1928 6 Sheets-Sheet 4 N VENTO,Q 77] 12 lo Vow.- (012.4

June 16, 1931. 'r. YONEKURA I 1,810,455

SUCTION DEVICE OF PAPER MAKING MACHINES Filed y 26, 1928 s Sheets-Sheet 5 m m n, I g i 5 F 4 H '7. m 3 ma t: I 11 i, 2 ii I I H i H 8 in F1 N vENTo a; 7- 2/0 fans/41124 A TTaJE June 16, 1931. v 'r. YONEKURA 1,810,456

SUCTION DEVICE OF PAPER MAKING MACHINES Filed July 26. 1925 6 She ets-Sheet s AT-raeA/EVJ 25 contact with the rolls.

gate nted June 16, 1931 UNITED STATES TARIO YONEKURA, OF TAKAOKA, JAPAN SUCTION DEVICE OF PEER-MAKING MACHINES Application filed July 26, 1928, Serial No. 295,563, and in Japan August 18, 1927.

This invention relates to an improvement in suction device for paper-making machines. According to this invention, the rolls are placed at the upper two extreme ends of the base of an inverted triangle, and a revolving suction pipe is placed at the apex of the said triangle. A suction chamber, with its two sides closed air-tight, is formed by a flexible belt running over the said rolls and a suction pipe, by means of which moisture in the wet paper is removed when said paper passes over the suction surface. An object of the present invention is to produce a paperhaving the same fineness or smoothness on both sides by means of wire cloth bearing against wet paper in the machine. A further object of this invention is to raise the efficiency of the device by providing two suction boxes for the purpose of removing simultaneously the moisture from both surfaces of the paper whereas, in the machines hitherto used, one suction box only is provided to absorb the moisture from the reverse surface of the paper, i. e. from the side of the paper in Another object of this invention is to draw off the moisture with a reduced vacuum in a suction box facing said reverse side of paper. Owing to this provision of two boxes for each paper surface instead of one as hitherto known, the suction power is doubled. In the drawings Fig. 1 shows the transverse section of the suction device;

Fig. 2 its plan view; Fig. 3 a side view of the side wall partially cut away;

Fig. 4 the plan view showing the one side of the suction device;

Fig. 5 the sectional plan view of the side wall of Fig. 3 out along the line VV.

Fig. 6 the sectional plan view out along the line VI-VI of Fig. 3;

Fig. 7 the sectional plan view of the same out along the line VII-VII of Fig. 3; and Figs. 8 to 18 the modified forms of the Suction device in sketches. To describe the device in details, to one end of the base of an inverted triangle, prime mover roll 1 and to the other end a follower roll 2 are fixed. The revolving axles 3 and 4 of the said rolls are connected by a chain belt 5. The suction chamber 9 is formed by an endless rubber belt 8 stretched or run over the prime mover roll 1, the perforated revolving suction pipe 7 provided at the apex or lowest point of the inverted triangle and the follower roll 2, and by closing the two sides of the chamber with wood or other materials to form the side walls 10. Through the sidewalls, run two horizontal rods 14 co and 15 to which are fitted upright poles12 and 13 standing on the frame 11. Two horizontal rods 14 and 15 are screwed on two outer pipe rods 16, which are fitted to the side walls and to which a handle 17 is fitted. 66 By turning the handle, the outer pipe rods are made to advance toward or recede from the side-walls so as to correspond to the motion of the rubber belt 8. A stuifing box 18 is provided for at the outerends of the protecting pipe rods in order to make them airtight. An adjusting rod 19 is fitted to the side-walls-and another stufling box 20 is arranged at the parts of the walls through which said rod runs to keep them air-tight.

The bent end of a level plate is fixed to the inner end of the adjusting rod at a point close to the upper ends of the side-walls and also close to the sides of the rubber belt. By these means the level plate is made to reciprocate on a level by the manipulation of the adjusting rod so that the area of suction is adjusted to any degree desired.

Inside the above mentioned suction pipe 7 a brushing rod 22 is axially arranged, said 35 pipe being kept air-tight by a stufiing box 23. These means are used for brushing and cleaning the suction pipe provided with perforations 24 from the inside. Another stufiing box 25 keeps the part of the suction pipe carrying the brushing rod 22 airtight. A Igipe 26 is connected with the suction pump y means of which moisture of thewet paper is absorbed when it passes the suction surface, the remainder being removed in the suction chamber.

In the above manner, the wet paper 30 lying in front of the couch roll is made to stick close to the reverse surface of the straining wire net 31 (Fig. 8) which carries the 1 paper forward. The width of the suction surface'is adjusted by meansoflevelplates regulated by the ad; rods" The next step is to the side-w of the suction 5 chamber airtight, this done by turn ing the handle 17 and there y closely fitting 2 the side-walls of the suction chamber to the sides of; the rubber belt 8. Then, the primemover roll 1 is revolved togetherzwith the follower-rolls '2, its speed being kept equal to that of-"the .wet aper 30,.pass ng...the suction surface of e suction chamber 9. The interior of said Ychamberis evacuated'by the actionof. suction pump.

u Fig. 8 shows 5 .wayof example a suction roll arranged un er -a cloth or strainer wire- ,cloth-. The suction chamber 9 is formed by i a rubber belt 8 stretched over the priniemover p rforated. revolving-suction a pi :7, and the flower-r0112. r The moisture face of chamber. rjTension of the rubber belt may be regulated by means of a stretcher roll 6.- in, Fig. the; strainer wire-cloth is so positioned as to, pass ove'rthe suction surface; This is done by stretching the wirecloth I 32 over the prime-mover 'rollY-1 fol- ,Tlower-roll2, and stretcher roll 6. Fig. 10 c is another modificationof the device 5.

to Figs. and 12 the suction chamber 9 is placed over the strainer wire I cloth or cloth of a paper-making machineof long net t pe. In this case the'moisture 1s absorbed 'rectly-ofl the wet paper, which is then carried forward and pressed. For this purposeasuction chamber 9, stretcher-rolls and shower-rolls 29 are provided and an endless wire-cloth 32.is.. stretched over a ido -roll 33,: the stretcher roll 6, the folower-roll 2 and the prime mover roll 7. Said wire cloth can be ledthrough a water tank 34 anditis' then washed once in each revolution;

- Fig. 13 shows a suction roll which is so made as to absorb the moisture directly from thewet pa er b means of a suction chamber which-is place in contact with the surface of wet paper passing the surface of cylinder mould. Thedevice isoperated in such a way that the prime-mover roll 1 turns the follower-rolls 2 by' means of which the wet paper is carried forward together with wire cloth 32 which is stretched over the prime-mover roll 1, follower roll 2, stretcher roll 6 and guide roll 33. i V Fig. 14 shows a suction roll arranged inside i of the cylinder mould. In this case, the moisture contained in the wet paper passing the surface of the cylinder mould is absorbed into the. suction chamber 9 formed by the rubber belt 8 stretched over the'prime-mover scroll 1, follower-roll 2 and suction pipe 7,

v and suction pi Fig-15 is-a somewhat modified construc-' tion of-the device shown in-Fig. 14.

Figs. 16 to.18.show other modified forms of the dev ce according to invention.

In all modifications prime-mover roll and. I

follower-roll are by a 1 chain belt e a shit riine-mover roll being connected w1 However, if some of the above elements willbe removed or disconnected the endlessbelt will, automatically, move or revolve at a speed equal to that of the strainer wire-cloth 32 owing to its friction with the belt createdby the suction force. p

. Claims:

1 Inasuction device f0 paper-making mach1nes,thecombination of a prime-mover roll at one end of the machine, afollower roll at the other end thereof, a suction ipe between said'rolls, a flexible belt exten ing around said rolls and suction pi e to form a chamber having a suction sur ace, and side-walls for said chamber combining with said belt to make the chamber airtight.

2.. In a suction device for paper-making" machines, the combination of a prime-mover [roll at one end of the machine, a follower roll at the other end thereof, 'a suction between said rolls, a flexible belt exten P I ing around said rolls and suction pipe to form a chamber having a suction surface, sidewalls for said chamber combining with said belt to make the chamber airtight, and a wire cloth extending over the suction surface ofsaid chamber. A

' 3. In a suction device for paper-making machines, thecombination with a cylinder mould; of a prime-mover roll at one end of the machine, a follower roll at the other end thereof, a suction pipe between said rolls, a flexlble belt extending around said rolls and suction pipe to form a suction chamber, said belt being positioned close to the inner face i of said cylinder'mould to absorb themoisture oif the'wet paper when it passes'the surface of said mould, and side walls'forsaid suction chamber.

In testimony whereof I have aflixed my signature. 4

TARIO YONEKURA. 

